[Python-Dev] Proposal for new 2to23 tool

[Brett Cannon]

On Nov 12, 2007 12:50 AM, Graham Horler <graham.horler at gmail.com> wrote:
> On 12 Nov 2007, 03:24:34, Jan Claeys wrote:
> >
> > Op zondag 11-11-2007 om 17:19 uur [tijdzone -0800], schreef Brett
> > Cannon:
> > > On Nov 11, 2007 4:00 PM, Graham Horler <graham.horler at gmail.com> wrote:
> > > > I have been developing in Python since 1.5, and now have to support 2.1
> > > > as a minimum version.  I do like to keep my code runnable on newer
> > > > versions however, and am considering the feasability of forward
> > > > compatibility with Python 3.0.
> > > >
> > > > I also notice the Leo[1] project could use some assistance with forward
> > > > compatibility.
> > > >
> > > > So I was wondering if anyone else had a need for a 2to23.py tool to help
> > > > make code compatible with 3.0 but not break it for 2.x.
> > >
> > > What exactly are you proposing?  We already have 2to3
> > > (http://svn.python.org/view/sandbox/trunk/2to3/) for source-to-source
> > > translation from 2.x to 3.0.
> >
> > Graham wants to convert his code such that it works on both Python 2.x
> > (probably even early versions of it?) & Python 3.x.  Not 2 instances of
> > code, but one source that works on both 2.x and 3.x...
>
> Absolutely
>

Well, we will do our best to make a common base between 2.6 and 3.0.
But since things are still in flux who knows if everything can somehow
be added through a __future__ statement in 2.6.  As for supporting
older versions, that won't happen.

-Brett